They were used in unit trains for transporting coal

The Trainz SKU for this item is P11997199

and all of the necessary driver circuitry to enable easy and direct connection to the output of any Circuitron detection circuit such as the DT-4

Trainz Product Id: 12415568

opening doors and latch couplers

Walthers 949-4319 HO Single Square Modern Parking Lot Light VariantsUnitPrice_number_53.47 They were used in unitThis is a Walthers 949 4319 HO Scale Single Square Modern Parking Lot Light 3 3 4 Tall x 1 2 Wide 9. 5 x 1. 2cm. It Features: North American style lights with square fixtures & poles, Perfect for contemporary industries, stores parking lots & more, Great detail for day or night scenes, Fully assembled from tough metal parts, Install in minutes in new or existing scenery, Easy to wire with plug & socket or factory installed leads as appropriate,